Got 30 Rock S2 at 200. S1 I bought at 600 a couple of weeks ago. Tempted to get Heroes S3 at 500, but I don't like that series that much, so decided to wager that the price will get lower for that series (at the risk of it being sold out).
Also tempted to get House S1-5 at ridiculous prices of 300 -500 per season, even if I already have them. But I can't think of someone to give them to, it's just too tempting not to buy, even if you really have no need of them.